Location:
Bengaluru (Manyata Tech Park)

Experience:
2–8 years Qualification: BE / B.
Tech

About the Role
We’re hiring L3 Protocol Developers to design, build and debug control-plane features for LTE and 5G NR RAN products. You’ll work on real-world eNodeB/gNodeB software across vRAN, O-RAN and custom deployments, tackling everything from call-flow design to field issue resolution. Must-Have Skills
• Strong hands-on experience in RAN Layer 3 protocols: RRC and PDCP
• Proficiency in C++ (C/Python is a plus)
• Solid understanding of 3GPP specifications
• Background in Telecom / Wireless (4G/LTE/5G) Valuable to Have
• Google Test Framework (GTF)
• S1AP, X2AP, NGAP, F1AP, E1AP, XnAP interfaces
• 4G/5G L3 procedures: attach, handover, re-establishment, carrier aggregation, EN-DC/NR-DC, paging, idle/connected transitions, RLF handling
• ASN.1 encoding/decoding, state machine design, timer and error handling
• L3 data path: GTP-U, DPDK, VPP
• Linux, IPC,



multithreading; Docker and Kubernetes
• Log and trace analysis using Wireshark, QCAT, Viavi, IxLoad, IxNetwork or Spirent Landslide
• Exposure to SR-IOV, hugepages, SmartNIC/DPU or FPGA acceleration for virtualized DU/CU What You’ll Do
• Design and implement RRC and control-plane features (S1AP/X2AP/NGAP/F1AP/E1AP/XnAP) for LTE and NR
• Debug and fix issues such as attach/registration failures, handover drops, security-mode failures, RRC resume issues and paging misses
• Resolve multi-vendor interoperability issues across UEs, chipsets and core networks
• Analyse field logs and traces, and reproduce issues in the lab
• Work with verification, OAM and core-network teams on call-flow validation, stress and negative testing
• Senior candidates: mentor team members and interact with internal and external stakeholders

📌 Protocol Developer (Bengaluru)
🏢 LogicHive®
📍 Bengaluru